Lock.



. Pteted Apr. 24, |900. `C. w. BIRUM.

LUCK

(Application mad oct. a

2 Sheets-Sheet 2-.

(No Modal.)v

NTTED STATES PATENT OFFICE,

CHARLES W'ATSO BIRUM, OF VICTOR, COLORADO.

LOCK.

SPECIFICATION forming Vpart of Letters Patent No. 648,098, dated April24, 1900- Application illed October 30,1899. Serial No. 735,202. (Nomodel.)

To all whom it may concern,.-

Be it known that I, CHARLES WATSON B1- RUM, a citizen of the UnitedStates, residing at Victor, in the county of rlleller and State ofColorado, have invented certain new and useful Improvements in Locks, ofwhich the following is a full and complete specification, such as willenable those skilled in the art to which it appertains to make and usethe same.

This invention relates to combination-locks; and the object thereof isto provide a lock of the class described which shall be simple andefficient in its construction and operation; and the invention consistsin the construction and arrangement of parts, all as fully described andclaimed in the following specification, of which the accompanyingdrawings form a part, in which like reference characters denote likeparts in the several views, and in which- Figure 1 is a sectionalelevation of a lock constructed according to my invention, several ofthe parts thereof being shown in full lines; Fig. 2, a fop view thereof;Fig. 3, a section thereof on the line 3 3 of Fig. 1, and Fig. 4 asection thereof on the line 4 4 of Fig. 1.

Referring more particularly to the draW-.

ings, I have shown at 5 a lock-casing which is preferably tubular inform and is provided at its lower portion with a conical extension 6.The casing 5 is provided with a top plate 7, which is preferably rivetedthereto, as at 8, and the conical extension 6 is provided with a chamber9, vwhich communicates with the interior of the casing 5.

An operating-knob 10, which is provided with a bulbous base 11, isrevolubly mounted upon the top plate 7, being provided with a shank 12,which passes through an opening centrally of the top 7. Anoperating-plate 13 is passed upon the shank 12 directly beneath thecasing-top 7, being connected with said shank by screw-threads 14, and alocking-nut 15 is screwed to the lower end of the shank 12, as at 16,securely retaining the operatingplate 13 in position;

The operating-knob 10 and base 11 and shank 12 thereof are bored, as at17, and passed therethrough is a bolt 18, which also extends within thecasing 5, through the chamber 9 of the conical extension 6, and

'said tumbler.

`through a bore 19 in the end 20 of said extension and terminating in ahook-shaped end- 21, exterior of said extension 6. The bore 19 is, asshown in Fig. 4, square in form and provided at one side with a squareextension 22, and the bolt 18, adjacent the head 21 thereof, ispreferably squared and provided with a squared laterally-directed lug23, which operates within said bore extension 22. Pivotally connectedwith the outer end of the hookshaped head 21 of the bolt 18, as at 24,is a curved hook-shaped keeper 25 of similar form to the hook-shapedhead 21 and provided at its inner end with a squared angular extension26, which also operates within the bore 19, and a portion of the bolt 18is, as shown at 27 in Fig..1, iiattened to receive the square extension26, the resulting cross-section of said portion 27 of the bolt 18 andthe angular extension 26 of the keeper25 being of the same dimension asthe diameter of the bolt 18, which is preferably cylindrical in form.

The bolt 18 is provided within the casing 5 with a pair of locking-pins28, which are arranged longitudinally of said bolt upon the same sidethereof. Firrnly connected with the casing 5 at one side and extendingthereinto are a pair of spaced guide-pins 29, and passed revolubly uponthe bolt 18, beneath the guide-pins 29 and the locking-pins 28, is

-a circular disk-shaped tumbler 30. Passed upon the bolt 18, between theguide-pins 29 and the locking-pins 28, is a similar tumbler 31, and, asshown in Fig. 3, each of the tumblers 30 and 31 is provided with aradiallyarranged transverse slot 32, which communicafes with the openingtherein, by means of which it is passed upon the bolt 18.

The operating-plate 13 is provided with a downwardly-directedoperating-pin 33, and the tumbler 31 is provided with a transversestop-pin 34, which projects above and below The tumbler 30 is providedwith an upwardly-projecting stoppin 35, which is arranged within thecircular path of the stop-pin 34 of the tumbler 31 and so disposed as tobe engaged by said stop-pin 34.

The peripheries of the tumblersl 30 and 31 are provided with recesses36, and the casing 5 is chambered at one side,'as at 37. Mounted withinsaid chamber 37 is a vertically-ar- IOO ranged spring 38, which isrigidly secured at drawings an d the following statement thereof: 4

The base 11 ot' the operatingknob 10 is provided with a circular scale41, such as is commonly employed in combination-locks or as mayotherwise be preferably employed, and

.said scale operates in connection with suitable graduations 42, formedupon the casingtop 7. The base 11 and knob 10 may be rotated upon thecasing-top 7, and the scale 41 operates in connection with thegraduations 42, as is customaryin devices of this class, to revolve thelockiug-plate 13 and the lockingpin 33 to engage the stop-pin 34, whichin turn engages the stop piu When the knob 10 has been operated in amanner predetermined by the combination or schedule which refers to thescale and which determines tlie operation by the operating-pin 33 of thetumblers 30 and 31, the locking-pins 2S will be brought intoregistration with the slots 32 in the tumblers 30 and 31, and the bolt1S may be moved longitudinally of the casing 5, through the tumblers 30and 31, and through the chamber 9 of the extension (i, withdrawing thesquared lug 23 from the extension 22 of the bore 19 and allowing theangular extension 26 of the keeper 25 to be swung upon its pivot 24 outof said bore 19. It is understood that the hooked end 21 of the bolt 1Sand the hook-shaped keeper 25 form together the member of my improvedlock with which the device to be locked is operatively connected andthat when said angular extension 26 is within the bore 19 any articlewhich is passed through the space between,

the hook-shaped keeper 25 and bolt end 21, if of proper construction,cannot be withdrawn from said space while said extension 26 is withinthe bore 19. The sounding-pins 39 maybe pressed inwardly, iiexing thespring 3S, and may engage the recesses 36 in the tum- Ablers 30 and 31,thus allowing of operating the device according to the combination ofmoves thereof Without visual reference to the scale 41 and graduations42, said recesses 36 being spaced to correspond with the spacing of thegraduations 42 and the graduations' of the scale 41, it being evidentthat each time one of the sounding-pins 39 rides into one of therecesses 36 a click will result. The series of recesses 36 may be`broken at some point, if desired, to cause a breakin the clicks, thusassisting in reckoning thereby.

It is evident that the combination or governing schedule of moves of theoperatingplate 13 and tumblers 30 and 31 may be varied at will, providedthat the totality of the resultant movesis sufiicient to bring thelocking-pins 2S into registration with the recesses 32in thetumblers 30and 3l. When the lockingpins 2S have passed downwardly through therecesses 32 and the laterally-directed lug 23 has passed out of theextension 22 of the bore 19, the bolt 18 may be turned so that thelocking-pins 2S may pass out of said bore extension 22, allowing thewithdrawal of the bolt 1S and its connected parts.

It is evident that I may make many variations in the construction andarrangement of the elements above described as .embodying my inventionwithout departing from the scope thereof.

Having fully described my invention, I claim as new and desire to secureby Letters Patentm 1. Alock,comprising a casing, a bolt passedtherethrough, a tumbler passed upon said bolt within said casing,devices for normally preventing the passage of said bolt through saidtumbler, means for operating said tum bier, and allowing the passage ofsaid bolt through said tumbler, and said bolt being pro vided at one endwith a pivoted keeper which operates within a here formed within saidcasing and through which said bolt passes, substantially as shown anddescribed.

2. A lock, comprising a casing provided with a bored extension, a boltpassed through said casing and bored extension and provided with alaterally-directed lug which operates within an extension of the bore ofsaid casing extension, a pivoted keeper connected with said bolt andprovided with an angular extension which operates within the bore ofsaid casing extension, a tumbler passed upon said bolt within saidcasing, devices for normally preventing the movement of said boltthrough said tumbler, and means for operating said tumbler to allow thepassage of said bolt through said tumbler and allow said angularextension of said keeper to be withdrawn from the bore in said angularextension of said casing, substantially as shown and described.

3. A lock of the class described, comprising a casing, a bolt passedthrough said casing, a pair of tumblers revolubly passed upon said boltwithin said casing, a locking-pin arranged upon said bolt and normallydisposed between said tumblers, another locking-pin arranged upon saidbolt and normally disposed above said tumblers, said tumblers beingprovided .with slots or recesses adapted to register with saidlocking-pins, and each of said tnmblers being provided with a stoplpinwhich are arranged to coengage, an operating device revolubly mountedupon said casing and extending through an opening therein and providedwith an operating-pin IOO which operates in connection with one of saidstop-pins to bring said recesses into engagement with said locking-pinswhereby said bolt 'may be passed through said tumblers, substantially asshown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing Witnesses, this 21st day ofOctober, 1899.

CHARLES WATSON BIRUM.

Witnesses WILLIAM M. SUOKWORTH, EDWARD H? NEWLAND.

